Sure, load them in the same syringe, no problems at all.
I don't think 50mg/week of deca is going to do anything noticeable. I know everyone is different, but man, that is a pretty low dosage.
I say that because my previous cycle, I tried NPP at around 100/week(maybe a little more, my old man memory is fading), and I got NO joint relief. So my last cycle I tried deca instead just to see if the ester made any diff. Plus really bump up the dosage(tired of tip toeing)
I too am on TRT, test cyp, 200/mg week. I added 500mg/week of deca. I didn't feel any pain relief until about week 6 or 7. I was about to give up hope, but man, when it did take affect, it was GREAT. Joint pain almost completely gone. Not only could I do shoulder work once again, but I could sleep better from not having to reposition myself every 15 minutes. Been off deca a month and still no pain! I know the long ester will probably release all the remaining deca very soon though.
I found deca at 500mg/ml because I pin every day and needed less volume for the smaller muscles I use. Front delts, side delts, traps and tris.
I try to keep each at below .5ml so the smaller muscle group can absorb. A little less than 200mg/week keeps me at:
Test Result Limits Lab
TESTOSTERONE 1476 NG/DL H 300−720 CPL
RESULTS RECHECKED AND VERIFIED
SEX HORM BIND GLOBULIN 22.1 NMOL/L 19.3−76.4 CPL
CALC FREE TESTOSTERONE 462.4 PG/ML H 47.0−244.0 CPL
I feel great at these levels, but my doc is not happy, so a few weeks before BW, I am gonna cut back a little, maybe to 125mg/week of test, just to make him happy.
I hope I can find the deca dosage that will give me the relief soon, and plan on trying 200mg/week next time, and I believe that may be a dosage I can continue forever.
You didn't mention your test dosage?